Road to SDN
Main features of SDN
Evolution of the SDN supporting technologies: centralized global view
Network Control Point
Evolution of SDN technologies: Programmability in Networks
Active networks: how it work
Motivation for active networks
Results
Evolution of SDN technology: Separation of control plane and data plane
Custom control: IETF FORCES (2003)
Custom control: IETF FORCES (2003)
Routing control platform
Ethane
Three principles
Ethane design
Flow setup and forward
Summary

Ethane

M. Casado, “Ethane, Taking control of the enterprise.” ACM SIGCOMM CCR, 37(4), 2007.
Predecessor of OpenFlow
Problems: too much manual configurations in enterprise networks.
Middleboxes at network choke points
additional tools, protocols, and layers
Need to make it more manageable!